seo-mobile

seo-mobile is a skill for Claude Code from Hainrixz/claude-seo-ai. It costs 65 tokens per session (1,231 once invoked), scanned A, original, MIT.

A mobile-compatibility check for a web page, using its captured page structure and HTML. It checks whether the page works on small screens and whether mobile visitors receive the same main content as desktop visitors.

In plain words
What is it for?
Use it to check viewport settings, horizontal overflow, interactive control sizes, readable text, and mobile-versus-desktop content. It can also create the viewport setting when it is missing.
Why use it?
It finds layout, text-size, tap-target, and viewport settings that can make a page difficult to use on a phone and can affect search visibility.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Runs only inside its plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else. Install the plugin, not this.

Part of the claude-seo-ai plugin — 34 skills, 5 agents, 1 hook shipped together

Good fit Use it to check viewport settings, horizontal overflow, interactive control sizes, readable text, and mobile-versus-desktop content. It can also create the viewport setting when it is missing.

Compare 6 skills from other repositories ↓
Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code
/plugin marketplace add Hainrixz/claude-seo-ai
Claude Code
/plugin install claude-seo-ai

Made for: Claude Code.

Or install claude-seo-ai, the plugin that ships this one along with the rest of its 34 skills, 5 agents, 1 hook.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for seo-mobile

README.md
[![agentmods](https://agentmods.dev/badge/skills/hainrixz/claude-seo-ai/seo-mobile/github.svg)](https://agentmods.dev/skills/hainrixz/claude-seo-ai/seo-mobile)
Your own site
<a href="https://agentmods.dev/skills/hainrixz/claude-seo-ai/seo-mobile"><img src="https://agentmods.dev/badge/skills/hainrixz/claude-seo-ai/seo-mobile/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for seo-mobile

Your own site · 80×15
<a href="https://agentmods.dev/skills/hainrixz/claude-seo-ai/seo-mobile"><img src="https://agentmods.dev/badge/skills/hainrixz/claude-seo-ai/seo-mobile.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 65 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,231 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00065 $0.01231
Opus 5 $0.00032 $0.00616
Sonnet 5 $0.00013 $0.00246
Haiku 4.5 $0.00006 $0.00123

Measured 4d ago against content hash f8c9809814cf, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

seo-mobile scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/seo-mobile/SKILL.md · 44 lines

How it starts

The opening of the file, as written. The whole thing — 44 lines — stays where its author put it; the contents beside it link to each section on GitHub.

seo-mobile (M7b)

Google indexes mobile-first: the mobile rendering of a page is the canonical one for ranking. This module checks that a page is usable on a small viewport. Layout problems that hurt mobile usability often surface as CLS — cross-check references/cwv-thresholds.md.

Inputs

Work from the PageSnapshot named in your dispatch envelope: read parsed from <run_dir>/pages/<slug>.json (metas[] for the viewport tag) and parsed_rendered when render.used is not none (layout/geometry checks need it); Grep pages/<slug>.html for verbatim evidence; site artifacts live in <run_dir>/site/{robots.json,sitemaps.json,discovery.json}. Deterministic findings already emitted by audit.mjs are listed in <run_dir>/findings.deterministic.json — do not re-emit those ids; add model-judged findings only. If invoked directly with a URL/path and no snapshot exists, first run node "${CLAUDE_PLUGIN_ROOT}/scripts/snapshot.mjs" <target> --out "${CLAUDE_PLUGIN_DATA}/runs" and use the printed snapshot path.

Audits

Working from the PageSnapshot (parsed_rendered when render.used is not none, else parsed):

  1. Viewport meta: a <meta name="viewport"> exists with width=device-width and initial-scale=1. Flag missing, fixed-width (width=1024), or zoom-blocking (user-scalable=no, maximum-scale=1) values — the last also harms accessibility.
  2. No horizontal scroll: detect fixed-width containers / large absolute widths that force the viewport wider than the device (content overflowing a ~360 px small viewport).
  3. Tap-target size: interactive elements (links, buttons, form controls) should be large enough and spaced so adjacent targets are not easily mis-tapped.
  4. Legible base font: body text rendered at a readable base size, not a desktop-only small size that forces pinch-zoom on mobile.
  5. Content parity: the mobile DOM must contain the same primary content, headings, structured data, and links as desktop — mobile-first indexing ranks what is in the mobile render, so hidden/stripped mobile content is a ranking risk.

Read the full file on GitHub · 44 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 4d ago Changed f8c9809814cf
  2. 6d ago Changed · +3 lines 7bbc656caafc
  3. 12d ago First seen · 41 lines · 65 tokens per session scan A a0e2692de103

Subscribe to this mod's changes

seo-mobile is a skill published in the GitHub repository Hainrixz/claude-seo-ai (59 stars, last pushed 5d ago), licensed MIT. It adds 65 tokens to every session and 1,231 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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